mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
/* It is desireable to use this bit on systems that have it.
|
|
The only bit of terminal state we want to twiddle is echoing, which is
|
|
done in software; there is no need to change the state of the terminal
|
|
hardware. */
|
|
|
|
#ifndef TCSASOFT
|
|
#define TCSASOFT 0
|
|
#endif
|
|
|
|
char *
|
|
getpass (prompt)
|
|
const char *prompt;
|
|
{
|
|
FILE *in, *out;
|
|
struct termios t;
|
|
int echo_off;
|
|
static char *buf = NULL;
|
|
static size_t bufsize = 0;
|
|
ssize_t nread;
|
|
|
|
/* Try to write to and read from the terminal if we can.
|
|
If we can't open the terminal, use stderr and stdin. */
|
|
|
|
in = fopen ("/dev/tty", "w+");
|
|
if (in == NULL)
|
|
{
|
|
in = stdin;
|
|
out = stderr;
|
|
}
|
|
else
|
|
out = in;
|
|
|
|
/* Turn echoing off if it is on now. */
|
|
|
|
if (tcgetattr (fileno (in), &t) == 0)
|
|
{
|
|
if (t.c_lflag & ECHO)
|
|
{
|
|
t.c_lflag &= ~ECHO;
|
|
echo_off = tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0;
|
|
t.c_lflag |= ECHO;
|
|
}
|
|
else
|
|
echo_off = 0;
|
|
}
|
|
else
|
|
echo_off = 0;
|
|
|
|
/* Write the prompt. */
|
|
fputs (prompt, out);
|
|
fflush (out);
|
|
|
|
/* Read the password. */
|
|
nread = __getline (&buf, &bufsize, in);
|
|
if (buf != NULL)
|
|
if (nread < 0)
|
|
buf[0] = '\0';
|
|
else if (buf[nread - 1] == '\n')
|
|
{
|
|
/* Remove the newline. */
|
|
buf[nread - 1] = '\0';
|
|
if (echo_off)
|
|
/* Write the newline that was not echoed. */
|
|
putc ('\n', out);
|
|
}
|
|
|
|
/* Restore echoing. */
|
|
if (echo_off)
|
|
(void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t);
|
|
|
|
if (in != stdin)
|
|
/* We opened the terminal; now close it. */
|
|
fclose (in);
|
|
|
|
return buf;
|
|
}
|